Zobrazeno 1 - 10
of 30
pro vyhledávání: '"J.R. Pickering"'
Publikováno v:
IET Science, Measurement & Technology. 5:163-174
A synthesiser of low-frequency voltage waveforms with absolute voltage accuracy is described, optimised for the calibration of measurement devices near power-line frequencies. The synthesis of a low-pass-filtered piecewise waveform from a conventiona
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39214639ff14ab620653b8ed3c95dfe2
https://doi.org/10.1049/iet-smt.2010.0168
https://doi.org/10.1049/iet-smt.2010.0168
Publikováno v:
IET Science, Measurement & Technology. 3:165-174
A digitally controlled voltage generation and measurement unit optimised for high-precision electrical metrology is described. It is optically isolated from the controlling computer and contains specially constructed isolated power supplies allowing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9c27caccc9fb746abe4add58de7e7c2
https://doi.org/10.1049/iet-smt:20080112
https://doi.org/10.1049/iet-smt:20080112
Publikováno v:
IEE Proceedings - Science, Measurement and Technology. 151:362-367
Oversampling delta–sigma (Δ–Σ) analogue-to-digital converters (ADCs) are increasingly used in instrumentation applications. The main characteristic of the Δ–Σ ADC is that an increase in the oversampling ratio of the input signal and/or the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59c99e666ad1866d5aa4eee8aafe496c
https://doi.org/10.1049/ip-smt:20040847
https://doi.org/10.1049/ip-smt:20040847
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 52:440-444
A new DC current reference standard has been developed for high- current power converter calibration in the large hadron collider (LHC) project at the European Organization for Nuclear Research (CERN). This standard provides a near ideal 10-mA DC cur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b77d7d7799d0041d75cb24da1d6898d
https://doi.org/10.1109/tim.2003.809915
https://doi.org/10.1109/tim.2003.809915
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 52:445-448
The Large Hadron Collider (LHC) particle accelerator project will require an accuracy of a few parts in 10/sup 6/ in the control of the current to the superconducting magnets. A new infrastructure for calibration is being built at CERN based on DC cu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61701c4733000fd7dac26e5b985b61dc
https://doi.org/10.1109/tim.2003.809914
https://doi.org/10.1109/tim.2003.809914
Autor:
Paul S. Wright, J.R. Pickering
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 48:457-461
The principle of digitally synthesized AC voltage standards is well established. This paper describes a new AC voltage standard which uses a traceable DC voltage standard as an input and produces an AC output at an equivalent RMS voltage to 1 /spl mu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76cf1b525e27e5966932640f5fa879ca
https://doi.org/10.1109/19.769627
https://doi.org/10.1109/19.769627
Autor:
J.R. Pickering, Paul S. Wright
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 44:429-432
This paper describes the development of a wattmeter designed for traceable power measurements to 30 kHz and above. A description is given of a technique, which uses the three RMS values of voltage, current and sum of voltage and current to measure po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a123fe75afdfbd95a794539a7456da1
https://doi.org/10.1109/19.377871
https://doi.org/10.1109/19.377871
Publikováno v:
CPEM 2010.
In this paper the extension of the AC Quantum Voltmeter is described with the aim of measuring waveforms at audio frequencies. A difference amplifier has been developed to improve the accuracy over the mHz to kHz range.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::43c70e5708c5c0af3bd4d944753a97fc
https://doi.org/10.1109/cpem.2010.5544453
https://doi.org/10.1109/cpem.2010.5544453
Publikováno v:
2008 Conference on Precision Electromagnetic Measurements Digest.
We describe a method for generating a low frequency sinusoidal calibration voltage with reference to a quantum standard, at the point of connection to the instrument under test (DUT). The voltage is made traceable to the maintained SI unit by a sampl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c425730afd77942fcd65904f0167b823
https://doi.org/10.1109/cpem.2008.4574660
https://doi.org/10.1109/cpem.2008.4574660
The DC current transducer (DCCT) and accompanying A/D converter determine the precision of a power converter in accelerator operation. In the LHC context this precision approaches 10-6 (1 ppm). Inside the DCCT a burden resistor is used to convert the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1272de6d081e36c212157f4b3c5db469
http://cds.cern.ch/record/1058540
http://cds.cern.ch/record/1058540
